Old San Juan is rich in Spanish tradition, with cobblestone streets and colonial architecture. This part of the Puerto Rican city is easily seen on foot, and cruise passengers can shop for handcrafted works or relax in a shaded park. New San Juan is distinctly elegant with lavish resorts, great restaurants and grand casinos. Visitors in San Juan can join an excursion to El Yunque, the only tropical rain forest in the U.S. national forest system. Adventurous travelers will want to partake in a deep-sea fishing, snorkeling or diving excursion.